3751666816 has 64 divisors (see below), whose sum is σ = 7576088760. Its totient is φ = 1850368000.

The previous prime is 3751666813. The next prime is 3751666817. The reversal of 3751666816 is 6186661573.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3035569216 + 716097600 = 55096^2 + 26760^2 .

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 3751666816.

It is not an unprimeable number, because it can be changed into a prime (3751666813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6735210 + ... + 6735766.

Almost surely, 2^3751666816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3751666816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3788044380).

3751666816 is an abundant number, since it is smaller than the sum of its proper divisors (3824421944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3751666816 is a wasteful number, since it uses less digits than its factorization.

3751666816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1193 (or 1181 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 49.

The square root of 3751666816 is about 61250.8515532641. The cubic root of 3751666816 is about 1553.8464048743.

The spelling of 3751666816 in words is "three billion, seven hundred fifty-one million, six hundred sixty-six thousand, eight hundred sixteen".